<template>
  <div>
    <div class="one">
      <div class="two">11</div>
    </div>
  </div>
</template>

<script>
export default {};
</script>

<style lang="less">
.one {
  width: 100px;
  height: 100px;
  background-color: red;
  .two {
    width: 50px;
    height: 50px;
    background-color: rgb(26, 255, 0);
  }
}
</style>